Iterate through NSArrayController in specific order

Question

I need to iterate through an NSArrayController in a coredata model by a specific order.

Lets say that my model has these columns:

animal (string)
name (string)
age (int)

and I would like to iterate trough the controller like this:

for (animal *a in myNsArrayController.arrangedObjects)
{
  // Rest of code
}

but I would need to do it ordered by animal age... how can i do that?

A search did not bring me to any usable results..

Answer 1

Try this, it builds off of AKV's answer but uses your code and contains the for loop. I think this should work!

NSSortDescriptor *sort = [NSSortDescriptor sortDescriptorWithKey:@"age" ascending:YES];
NSArray *sortedArray = [myNsArrayController.arrangedObjects sortedArrayUsingDescriptors:[NSArray arrayWithObject:sort]];
for (animal *a in sortedArray)
{
  // Rest of code
}

Answer 2

First sort the array based on animal age.

Then loop through it.

NSSortDescriptor *sort = [NSSortDescriptor sortDescriptorWithKey:@"animalAge" ascending:YES];
[yourArray sortUsingDescriptors:[NSArray arrayWithObject:sort]];

EDIT:

NSArray *yourArray=myNsArrayController.arrangedObjects;